Design and experimental research of an integrated GPS magneto window antenna

A 1.575 GHz integrated GPS magneto window antenna which aimed to reduce communication interruption of hypersonic aerial vehicle was designed, and a static verification experiment was done. The designed magneto window antenna was composed of a microstrip antenna and a permanent magnet. Its size was 100 mm100 mm75 mm, and a protection structure was designed. The microstrip antenna would not influence the magnetic field of the permanent magnet, and the permanent magnet would not change the resonant frequency of the microstrip antenna; the designed protection structure could eliminate all magnetic field in the non-propagation direction, and would not reduce the intensity of the magnetic field in the propagation direction. When tests were performed on plasmas of 25.5 mm in thickness and the electron density changed from 61010/cm3 to 11011/cm3 , the designed magneto window antenna raised the transmission coefficient from ［－19, －23.5］ dB to ［－11, －16］ dB. The results indicate that the designed GPS magneto window antenna could reduce the influence of plasma on the communication, the magneto window antenna size is miniaturized and the safety in communication is enhanced.